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Finding the Fourth Proportional to 7,153.14, 9,889.11 and 7,087.53

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Solution

The fourth proportional to 7,153.14, 9,889.11 and 7,087.53 is: 9,798.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,153.14 : 9,889.11 = 7,087.53 : x
  2. Step 2: Convert to fraction form
    7,153.14/9,889.11 = 7,087.53/x
  3. Step 3: Cross multiply
    7,153.14x = 9,889.11 × 7,087.53
  4. Step 4: Simplify right side
    7,153.14x = 70,089,363.80
  5. Step 5: Solve for x
    x = 70,089,363.80/7,153.14
  6. Step 6: Final answer
    x = 9,798.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.